Riveting apparatus



RIVETING APPARATUS Filed Aug. 25, 1943 B. G. CARLSON March 6, 1945.

INVENTOR. By 5597 664 x430 Patented Mar. 6, 1945 UNITED STATES PATEN 7 RIVETING mourns am G. Carlson, was, M0, assignor, by

to Jack a Heintz, ma, Cleveland, Ohio, a corporation of Ohio Application August 25, 943, Serial No. 499,932

mesne assignments,

2 Claims.

This invention relates to improvements in. means for expanding rivets and has for its pri mary object to provide a manually operable blind rivet set, by the use of which the rivet may be inserted in an appropriate hole in the pieces to be riveted together, the rivet expanding tool inserted in the rivet and after simple expanding operation be removed from the rivet for subsequent expanding operations on other rivets.

With this in mind, it is proposed to provide a rivet expanding tool to include a spindle with an enlarged head at one end to retain a removable rubber sleeve, an adjustable nut and a turnin knob for moving the spindle longitudinally so as to force the rubber sleeve to uniformly expand the rivet. In this manner the turning of the knob in the opposite direction will allow the removal of the tool from the rivet.

With the foregoing and other objects in view, the invention resides in the combination of parts and in the details of construction hereinafter set forth in the following specification and appended claims, certain embodiments thereof being illustrated in the accompanying drawing, in which:

Figure 1 is a view in vertical section taken through the tool, rivet and two adjoining pieces to be riveted together, and showing the tool inserted in the rivet prior to expansion of the latter;

Figure 2 is a view of the tool partly in elevation and partly in vertical section, showing the rivet flared; and.

Figure 3 is a view in vertical section of the flared rivetand showing the tool partly in elevation and partly in vertical section and removed from the flared rivet. I

Referring more particularly to the drawing, the two pieces to be riveted together are shown at l and 2. The invention having more primarily to do with blind riveting, it may be assumed that the underneath side of piece 2 is inaccessible. By means of the tool to be described the rivet 3, to be flared, may be'inserted into a hole extending through pieces I and 2 until its flange I rests on piece I.

The tool includes a spindle I with an enlarged head 6 to retain a removable rubber sleev I.

- be removed by first turning knob l0 countermains flared as shown in Figures 2 and 3. The

1 tween the bushing and head 6 in order to pre- Spindle 5 base screw threaded portion 8 to be.

which represents the position of the assembly T OFFICE.

as well as the rivet 3 through which it protrudes. The knob ill has been screwed down on the spindle screw threads 8 and barrel 9 is abutting the upper surface of knob I3.

A further turning of knob ill in a clockwise direction draws the spindle upwardly. The result of such movement is to distort the rubber sleeve by placing it under compression in the smaller vertical space between head 6 and bushing ii. The rubber sleeve, having no avenue of escape, exerts an outward force on the rivet and bows the main portion thereof, as shown in Figure 2,

when the rivet has been fully expanded and pieces i and 2 completely riveted together.

This having been accomplished, the tool may clockwise which relieves the vertical clamping pressure of bushing II and head 8 on rubber sleeve 1 until it resumes its original normal shape, as shown in Figures 1' and 3 while the rivet retool, having been removed, as shown in Figure 3, is then in readiness for subsequent operation on other rivets. The purpose of the adjustability of bushing ii is to adjust the normal distance bedetermine the expansion of the rivet and the dimensions of the rubber sleeve for proper rivet flaring operations.

By reason of the simple, effective, quick-acting and readily removable tool, each rivet may be quickly flared, the tool removed and the operation repeated on other rivets regardless of the blind and inaccessible nature of rivet location.

I claimi 1. A tool for compressing and flaring a blind hollow rivet having one preformed flared end and its other end straight and unflared to hold two pieces of material togethercomprising a spindle with an enlarged head insertable through the rivet, a sleeve of elastic deformable material slidable on said spindle and of a normal diameter substantially equal to that of said head to be retained thereby against movement in one direction on said spindle, a bushing 01 like diameter to said sleeve slidably carried on said spindle on the other side of said sleeve and also insertable in said rivet, a manually tumable barrel screw threadedly connected tosaid bushing to abut the preformed end of the rivet and adjustable longitudinally of said bushing to adjust the relationship between said enlarged head and sleeve and the lower end of said rivet, and a second hand tumable barrel screw threadedly connected to snidspmdletordnwingsamheadtomdnid bushing to predeterminedly deform said sleeve wmdthusexpmdandflarethcundenorbllnd,

portionoisaldrivettoforcesaldtwopiecaof material together and retain the same in such relationship.

lA-toolforcompressingandfiaringablhid hollow rivethavinsonepreformed flared endand itsotherendstraishtandunflaredtoholdtwo :lvet, asleeveof elastic deformable material slidableonsaidspindle andotahormal diameter substantially equal to that of said head to be retflnedtberebyagainstmovementinone directimonstidspindle, e'bushlngofmediameter tomsleeveslidablycarrledonsamspindlem theother side otsaidsleeveanclalsoinsertable in slid m5; 2. mannzmturnable barrel screw threadedlyconnectedtosaidbuahingtoamt the preformed end or the rivet and adlustable .mnmmm orwdbusnmgtoadmstthemmittormumeitsnormeldiametersothatthe,

sleeveandthexpmdleheadmaybe removed firomthefllradriret.

BERT G, CARISON. 

